Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'installation' = 'wscript.exe //B "%TEMP%\installation.vbs"'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'installation' = 'wscript.exe //B "%TEMP%\installation.vbs"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'siamhk' = 'wscript.exe //B "%TEMP%\siamhk.vbs"'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'siamhk' = 'wscript.exe //B "%TEMP%\siamhk.vbs"'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\installation.vbs
- %HOMEPATH%\Start Menu\Programs\Startup\siamhk.vbs
Creates the following files on removable media:
- <Drive name for removable media>:\siamhk.lnk
- <Drive name for removable media>:\installation.lnk
- <Drive name for removable media>:\siamhk.vbs
- <Drive name for removable media>:\installation.vbs
Malicious functions:
Executes the following:
- '<SYSTEM32>\rundll32.exe' <SYSTEM32>\shimgvw.dll,ImageView_Fullscreen %TEMP%\408795_322749034434391_100000978921126_939975_584536445_n.jpg
- '<SYSTEM32>\wscript.exe' "%TEMP%\siamhk.vbs"
- '<SYSTEM32>\wscript.exe' "%TEMP%\installation.vbs"
Modifies file system :
Creates the following files:
- %TEMP%\408795_322749034434391_100000978921126_939975_584536445_n.jpg
- %TEMP%\siamhk.vbs
- %TEMP%\installation.vbs
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\installation.vbs
- <Drive name for removable media>:\siamhk.vbs
Network activity:
Connects to:
- 'vp#####ker.no-ip.biz':9090
- 'localhost':1035
- 'localhost':1036
UDP:
- DNS ASK vp#####ker.no-ip.biz
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'ShImgVw:CPreviewWnd' WindowName: '(null)'
